青年人和老年人认知联系网络的整体结构分析  

Global structural comparison of cognitive associative networks between Chinese young and old people

作　　者：林枫[1] 江钟立[1] 周亮[1] 李淑景[1] 金怡[2] 何一然[2] 陶冶[3] 

机构地区：[1]南京医科大学第一附属医院康复医学科,210029 [2]江苏省省级机关医院(江苏省老年医学研究所) [3]南京师范大学新闻传播学院

出　　处：《中国康复医学杂志》2008年第4期291-296,I0001,共7页Chinese Journal of Rehabilitation Medicine

基　　金：江苏省卫生厅科技计划资助项目(H200732)

摘　　要：目的:从词汇联想网络角度比较青年人和老年人认知联系结构的整体特征。方法:正常青年人和老年人各50人。以Kent-Rosanoff中文对等词为刺激词进行自由联想测试。取两组共有的反应词构建两组人群的"反应词-反应词网络"(RR网络),即青年组RR网络(YRRN)和老年组RR网络(ORRN)。采用Pajek1.14和Ucinet6进行网络分析。结果:YRRN连线分布的密度高于ORRN,连线分布的不均匀程度低于ORRN。ORRN有一个宗教话题的独立子网络。ORRN点度层次比YRRN少。网络整体指标显示ORRN密度显著低于YRRN(P<0.01),而点度中心势显著高于YRRN(P<0.01)。YRRN平均最短路径长度和云集系数小于ORRN,而直径略大于ORRN。结论:老年人的认知联系结构趋于精炼和内敛且存在更独立的概念群,青年人则趋于联系更丰富和更富于拓展性,提示有必要根据不同年龄的患者选择相应年龄段的词汇组合以供康复评估和训练使用。Objective：To compare the global structures of cognitive associative networks in Chinese young and old cohorts by network analysis. Method： One hundred healthy subjects including fifty young and fifty old people were enrolled in this study. The stimulus words in free association test were composed of 100 Chinese words corresponding to Kent-Rosanoff list. Two ＂response-response＂ word networks（RR networks）, including RR network of young （YRRN） and old （ORRN）, were constructed from the response words shared by young and old subjects. Pajek1.14 and Ucinet6 were used for network analysis and visualization. Result：The distribution of linkages in YRRN was thicker than that in ORRN. The distribution of the linkages in ORRN was more uneven than that in YRRN. An isolated subnetwork about religion was observed in ORRN. The amounts of degree partition in ORRN were fewer than that in YRRN. The global parameters showed that network density in ORRN was significantly lower than that in YRRN （P〈0.01）. The degree centralization in ORRN was significantly larger than that in YRRN （P〈0.01）. The average shortest path length and network clustering coefficient in YRRN was lower than that in ORRN. The diameter in YRRN was slightly larger than that in ORRN. Conclusion：The cognitive associative structure in old people is more simple and stereotyped and has more independent concept clusters. The cognitive associative structure in young people tends to be more interactive and extensible. It＇s essential to select different word sets for rehabilitation in different age populations.

关 键 词：认知联系结构 词汇联想测试 网络分析 认知康复 年龄 

分 类 号：R49[医药卫生—康复医学]